In our living room, we normally put sofa against the wall, and we never use the space on the back of the sofa. What if we put the sofa out of the wall and have basic narrow shelf on the back, or put the basic narrow shelf in between the sofa and the wall. These will create some additional space to your room. We can put some comic books, lean a big picture frame, or keep some decorative items on it.
w.120/150/170x d.20 x h.65